GOODWILL & INTANGIBLE ASSETS - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization expenses	$ 81,608	$ 91,189	$ 108,364
Cost of product revenue
Finite-Lived Intangible Assets [Line Items]
Amortization expenses	20,457	26,664	34,039
Operating expense
Finite-Lived Intangible Assets [Line Items]
Amortization expenses	$ 61,151	$ 64,525	$ 74,325